Structural Elucidation of a Small Molecule Inhibitor of Protein Disulfide Isomerase.

Abstract:

:Compound libraries provide a starting point for multiple biological investigations, but the structural integrity of compounds is rarely assessed experimentally until a late stage in the research process. Here, we describe the discovery of a neuroprotective small molecule that was originally incorrectly annotated with a chemical structure. We elucidated the correct structure of the active compound using analytical chemistry, revealing it to be the natural product securinine. We show that securinine is protective in a cell model of Huntington disease and identify the binding site of securinine to its target, protein disulfide isomerase using NMR chemical shift perturbation studies. We show that securinine displays favorable pharmaceutical properties, making it a promising compound for in vivo studies in neurodegenerative disease models. In addition to finding this unexpected activity of securinine, this study provides a systematic roadmap to those who encounter compounds with incorrect structural annotation in the course of screening campaigns.

journal_name

ACS Med Chem Lett

authors

Kaplan A,Stockwell BR

doi

10.1021/acsmedchemlett.5b00014

subject

Has Abstract

pub_date

2015-07-29 00:00:00

pages

966-971

issue

9

issn

1948-5875

journal_volume

6

pub_type

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